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List:       xen-devel
Subject:    [Xen-devel] [PATCH 4 of 4] Add suspend_cancel flag to linux elf
From:       Brendan Cully <brendan () cs ! ubc ! ca>
Date:       2007-02-28 6:38:23
Message-ID: c80136cd1ecfd5f351f4.1172644703 () ventoux ! cs ! ubc ! ca
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# HG changeset patch
# User Brendan Cully <brendan@cs.ubc.ca>
# Date 1172644689 28800
# Node ID c80136cd1ecfd5f351f48bb4d18b80f1a6fbfb5b
# Parent  c61bfd68ca422003ea6c0ed6e13e26dc881b98a8
Add suspend_cancel flag to linux elf notes.

Signed-off-by: Brendan Cully <brendan@cs.ubc.ca>

diff -r c61bfd68ca42 -r c80136cd1ecf linux-2.6-xen-sparse/arch/i386/kernel/head-xen.S
--- a/linux-2.6-xen-sparse/arch/i386/kernel/head-xen.S	Tue Feb 27 22:38:08 2007 -0800
+++ b/linux-2.6-xen-sparse/arch/i386/kernel/head-xen.S	Tue Feb 27 22:38:09 2007 -0800
@@ -206,3 +206,4 @@ ENTRY(cpu_gdt_table)
 	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,   .long,  _PAGE_PRESENT,_PAGE_PRESENT)
 #endif
 	ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz, "generic")
+	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long,  1)
diff -r c61bfd68ca42 -r c80136cd1ecf \
                linux-2.6-xen-sparse/arch/x86_64/kernel/head-xen.S
--- a/linux-2.6-xen-sparse/arch/x86_64/kernel/head-xen.S	Tue Feb 27 22:38:08 2007 \
                -0800
+++ b/linux-2.6-xen-sparse/arch/x86_64/kernel/head-xen.S	Tue Feb 27 22:38:09 2007 \
-0800 @@ -186,3 +186,4 @@ ENTRY(empty_zero_page)
 	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,   .quad,  _PAGE_PRESENT,_PAGE_PRESENT)
 	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz, \
"writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
  ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz, "generic")
+	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long,  1)
diff -r c61bfd68ca42 -r c80136cd1ecf tools/xcutils/readnotes.c
--- a/tools/xcutils/readnotes.c	Tue Feb 27 22:38:08 2007 -0800
+++ b/tools/xcutils/readnotes.c	Tue Feb 27 22:38:09 2007 -0800
@@ -80,6 +80,9 @@ static int print_notes(struct elf_binary
 			break;
 		case XEN_ELFNOTE_HV_START_LOW:
 			print_numeric_note("HV_START_LOW", elf, note);
+			break;
+		case XEN_ELFNOTE_SUSPEND_CANCEL:
+			print_numeric_note("SUSPEND_CANCEL", elf, note);
 			break;
 		default:
 			printf("unknown note type %#x\n",
diff -r c61bfd68ca42 -r c80136cd1ecf xen/common/libelf/libelf-dominfo.c
--- a/xen/common/libelf/libelf-dominfo.c	Tue Feb 27 22:38:08 2007 -0800
+++ b/xen/common/libelf/libelf-dominfo.c	Tue Feb 27 22:38:09 2007 -0800
@@ -99,6 +99,7 @@ int elf_xen_parse_note(struct elf_binary
         [XEN_ELFNOTE_PAE_MODE] = { "PAE_MODE", 1},
         [XEN_ELFNOTE_FEATURES] = { "FEATURES", 1},
         [XEN_ELFNOTE_BSD_SYMTAB] = { "BSD_SYMTAB", 1},
+        [XEN_ELFNOTE_SUSPEND_CANCEL] = { "SUSPEND_CANCEL", 0 },
     };
 /* *INDENT-ON* */
 
diff -r c61bfd68ca42 -r c80136cd1ecf xen/include/public/elfnote.h
--- a/xen/include/public/elfnote.h	Tue Feb 27 22:38:08 2007 -0800
+++ b/xen/include/public/elfnote.h	Tue Feb 27 22:38:09 2007 -0800
@@ -157,9 +157,14 @@
 #define XEN_ELFNOTE_L1_MFN_VALID  13
 
 /*
+ * Whether or not the guest supports cooperative suspend cancellation.
+ */
+#define XEN_ELFNOTE_SUSPEND_CANCEL 14
+
+/*
  * The number of the highest elfnote defined.
  */
-#define XEN_ELFNOTE_MAX XEN_ELFNOTE_L1_MFN_VALID
+#define XEN_ELFNOTE_MAX XEN_ELFNOTE_SUSPEND_CANCEL
 
 /*
  * System information exported through crash notes.

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